CN101708939A - Sludge drying incineration processing system utilizing system residual heat - Google Patents
Sludge drying incineration processing system utilizing system residual heat Download PDFInfo
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- CN101708939A CN101708939A CN200810226030A CN200810226030A CN101708939A CN 101708939 A CN101708939 A CN 101708939A CN 200810226030 A CN200810226030 A CN 200810226030A CN 200810226030 A CN200810226030 A CN 200810226030A CN 101708939 A CN101708939 A CN 101708939A
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Abstract
The invention relates to a sludge drying incineration system utilizing system residual heat, comprising a sludge semidrying device, a sludge incineration device and a smoke residual heat utilizing device, wherein the sludge semidrying device is provided with a sludge receiving part and a discharge part; the sludge incineration device is provided with a semidrying sludge receiving part, a bottom slag discharge part and a smoke discharge part; the smoke residual heat utilizing device is provided with a smoke receiving part and a smoke discharge part; the discharge part of the sludge semidrying device is connected with the semidrying sludge receiving part of the sludge incineration device; and the smoke discharge part of the sludge incineration device is connected with the smoke receiving part of the smoke residual heat utilizing device. The sludge drying incineration system utilizing system residual heat is characterized in that the sludge semidrying device is also provided with a bottom slag receiving part and a smoke receiving part, wherein the bottom slag receiving part of the sludge semidrying device is connected with the bottom slag discharge part of the sludge incineration device, and the smoke receiving part of the sludge semidrying device is connected with the smoke discharge part of the smoke residual heat utilizing device.
Description
Technical field
The present invention relates to a kind of sludge anhydration burning processing system, in particular to a kind of sludge anhydration burning processing system that makes full use of system's waste heat.
Background technology
Along with the continuous quickening of Urbanization in China, the discharging of industry and sanitary sewage is increasing, and the quantity of the by product of sewage disposal--mud is also increasing.Mud is the higher cotton-shaped mud pellet of a kind of water ratio, wherein contains a large amount of organism, heavy metal and germ and pathogenic bacteria etc., if deal with improperly, can cause serious pollution to environment.Sludge treatment technology commonly used comprises landfill, compost, burning etc.Burning method can significantly reduce the volume of mud, has the advantage that processing speed is fast, innoxious, the minimizing degree is high, and burning process can also solve the stench problem of mud, and the heat that produces in the burning process can carry out recycling.Therefore constantly perfect along with the raising of incineration technology and gas cleaning level, sludge incineration more and more has remarkable advantages.But because primary moisture percentage in sewage sludge height, calorific value are low, it is carried out burning after the drying again is solution preferably.
The water ratio of sewage work's dewatered sludge is about 80%, and mud self calorific value of this moment can not must carry out drying treatment with the moisture evaporation of himself.After mud carry out half-driedization, if continue dryly, power consumption will increase, and prolong time of drying.Therefore generally mud being carried out half-driedization (45-60% moisture) is optimal path.
Conventional half-driedization of mud institute heat requirement is provided by the steam that sludge incineration produces, and the lime-ash that produces after the sludge incineration adopts the slag cooler cooling back that lowers the temperature to discharge usually.
China's utility model patent 200620049453.4 discloses a kind of sludge desiccation burning integral treatment unit.Warm flue gas in the part in the fluidized bed combustion device is introduced the rotary type sludge desiccation apparatus, half-driedization mud is sent in the fluidized bed combustion device, in another part of warm flue gas be transported in the air preheater, the primary and secondary air of fluidized bed combustion device is heated.Part lime-ash that fluidized bed combustion device is discharged and bed material are transported in the rotary type sludge desiccation apparatus, carry out blending with mud in the rotary type sludge desiccation apparatus.Warm flue gas heated air and mud during this method adopted, and had reduced the energy output of system, caused system efficiency and economic benefit to reduce.
Chinese patent application 200610113411.7 discloses a kind of sludge drying and incinerating treatment process.After former raw sludge at first carried out preliminary mechanical dehydration, send into the mechanical pelleting device, the sludge-drying fine powder that comes out in the mud after the granulation and the sludge drying mechanism mixes and stirs; Subsequently it is sent into the fluidized-bed sludge drying mechanism and be dried to water ratio below 5%.Send into incinerator after dried mud is warmed up to 50-60 ℃ earlier and burn, burn the part heat that produces and be used for fluidized bed drying device.The gas that produces in the drying sludge process is sent into incinerator behind heat temperature raising.Incinerator adopts slag tap mode or cyclone furnace.This method to almost completely dry, has increased the drying cost of system with drying sludge greatly, and system efficiency is reduced; Slag tap causes the thermosteresis of system serious simultaneously, and the thermo-efficiency of incineration system reduces, and economy reduces.
Chinese patent application 200510038416.3 utilizes spiral pump that water ratio is burned for the dewatered sludge of 75%-85% is injected in the COMBUSTION IN CIRCULATION FLUIDIZED BED chamber, and the dusty gas that dewatered sludge produces in storage utilizes blower fan to send in the COMBUSTION IN CIRCULATION FLUIDIZED BED chamber and burns.This system can also have steam blowing equipment and high pressure water cleaning device, cleans spiral pump, sludge carrier pipe and sludge spray head with not timing, prevents its dehydrated sludge blockage.Because mud fails fully to dewater and drying in this system, burns in the fluidized bed incinerator and directly send into, and must have auxiliary fuel combustion-supporting, makes system economy reduce.In addition, the waste residue waste gas that produces in the burning process reacts easily with moisture, produces more objectionable impurities, has stronger corrodibility, easily etching apparatus.Therefore need have the purifying treatment of complicated technology, otherwise be easy to contaminate environment after the discharging.
Summary of the invention
The purpose of this invention is to provide a kind of sludge anhydration burning processing system that makes full use of flue gas and end slag waste heat.
Above-mentioned and other purpose realizes that by a kind of sludge drying and incineration system according to the present invention described sludge drying and incineration system comprises: the half-dried makeup of mud is put, and is provided with mud acceptance division and discharge portion; Sludge incineration device is provided with half-driedization mud acceptance division, end slag discharge portion and fume emission portion; With the fume afterheat use device, be provided with flue gas acceptance division and fume emission portion, the discharge portion that the half-dried makeup of wherein said mud is put links to each other with the half-driedization mud acceptance division of described sludge incineration device, the fume emission portion of described sludge incineration device links to each other with the flue gas acceptance division of described fume afterheat use device, it is characterized in that: the half-dried makeup of described mud is put and also is provided with end slag acceptance division and flue gas acceptance division, the end slag acceptance division that the half-dried makeup of wherein said mud is put links to each other with the end slag discharge portion of described sludge incineration device, and the flue gas acceptance division that the half-dried makeup of described mud is put links to each other with the fume emission portion of described fume afterheat use device.
According to an aspect of the present invention, the half-dried makeup of described mud is put and also is provided with heat transfer tube, described fume afterheat use device is the waste heat boiler that is provided with discharge of steam portion, and the described heat transfer tube that the half-dried makeup of wherein said mud is put links to each other with the discharge of steam portion of described waste heat boiler.
According to invention on the other hand, the half-dried makeup of described mud is put and is adopted the bubbling fluidization bed structure.
According to invention on the other hand, the employing roller frame is put in the half-dried makeup of described mud.
According to a further aspect in the invention, described sludge incineration device adopts the circulating fluidized bed incinerator structure.
According to a further aspect in the invention, described sludge drying and incineration system also comprises fly-ash separator, link to each other with the fume emission portion of described sludge incineration device, thereby and/or put to link to each other with the half-dried makeup of described mud and can directly receive the half-dried makeup of described mud of flowing through and put the flue gas of discharge.
According to a further aspect in the invention, described sludge drying and incineration system also comprises the pollutant purification treatment unit, links to each other with described fly-ash separator and is positioned at described fly-ash separator downstream.
According to a further aspect in the invention, described sludge drying and incineration system also comprises chimney, links to each other with the pollutant purification treatment unit to discharge tail gas.
The lime-ash of the present invention after with the sludge stream fluidized-bed incineration sent in the dewatered sludge, and this is entered flue gas before the fly-ash separator by lime-ash and dewatered sludge mixture, can make full use of the low taste waste heat of this system like this.On the one hand the waste heat in flue gas and the lime-ash can be used for sludge-drying.Can absorb dust in the flue gas and small-particle after the moisture evaporation of mud on the other hand, reduce the load of fly-ash separator; Foul smell in the mud drying process can be taken away by flue gas; The adding of end slag also helps strengthening the accumulation of heat of fluidized-bed emulsion zone.The making full use of of above-mentioned waste heat helps to be used in the reduction system heat exhaustion of the steam and the flue gas of sludge-drying, thereby improves the energy utilization efficiency of system, improves system economy.
Description of drawings
Fig. 1 is the rough schematic view of sludge anhydration burning processing system of the present invention.
Embodiment
As shown in Figure 1, sludge anhydration burning processing system according to the present invention mainly comprises: the half-dried makeup of mud puts 1, sludge incineration device 2 and fume afterheat use device 3.
In certain embodiments of the present invention, the half-dried makeup of mud puts 1 for example can adopt fluidized-bed structure, rotary kiln or roller frame, but is not limited to these structures.The half-dried makeup of mud is put 1 and is provided with mud acceptance division, mud discharging portion and flue gas acceptance division (not specifically illustrating).
In certain embodiments of the present invention, sludge incineration device 2 for example can adopt the circulating fluidized bed incinerator structure, but is not limited to these structures.Sludge incineration device 2 is provided with half-driedization mud acceptance division, end slag discharge portion and fume emission portion (not specifically illustrating).
In certain embodiments of the present invention, fume afterheat use device 3 can adopt the waste heat boiler form.Fume afterheat use device 3 is provided with flue gas acceptance division and fume emission portion (not specifically illustrating).
The half-dried makeup of mud is put 1 discharge portion and is linked to each other with the half-driedization mud acceptance division of sludge incineration device 2, and the fume emission portion of sludge incineration device 2 links to each other with the flue gas acceptance division of fume afterheat use device 3.The half-dried makeup of mud is put 1 and also is provided with end slag acceptance division (not specifically illustrating), wherein the half-dried makeup of mud is put 1 end slag acceptance division and is linked to each other with the end slag discharge portion of sludge incineration device 2, and the half-dried makeup of mud is put 1 flue gas acceptance division and also linked to each other with the fume emission portion of fume afterheat use device 3.
In addition, the half-dried makeup of mud puts 1 can also be provided with heat transfer tube (not specifically illustrating), fume afterheat use device 3 can be for being provided with the waste heat boiler of discharge of steam portion (not specifically illustrating), and wherein the half-dried makeup of mud is put 1 heat transfer tube and linked to each other with the discharge of steam portion of waste heat boiler.
Can also comprise fly-ash separator 4 according to sludge drying and incineration system of the present invention, link to each other, thereby and/or put 1 with the half-dried makeup of mud and link to each other and directly to receive the half-dried makeup of the mud of flowing through and put 1 flue gas of discharging with the fume emission portion of residual heat using device 3.
Can also comprise pollutant purification treatment unit 5 according to sludge drying and incineration system of the present invention, it links to each other with fly-ash separator 4.At last, pollutant purification treatment unit 5 can link to each other with the tail gas behind the emission purification with chimney 6.
Technical process according to sludge drying and incineration system of the present invention is as follows.
Dewatered sludge enters the half-dried makeup of mud and puts 1, sends into sludge incineration device 2 (for example circulating fluidized bed incinerator) and burn after half-driedization, and the end slag after the burning is directly sent into the half-dried makeup of mud without cooling and put 1 pair of mud and carry out drying.The flue gas that sludge incineration device 2 produces is then sent into fume afterheat use device (for example waste heat boiler) 3, and the steam that fume afterheat use device 3 produces is used for heat supply or generating on the one hand, and another part is as the auxiliary energy of sludge drying.The flue gas that comes out from fume afterheat use device 3 be admitted to the half-dried makeup of mud put 1 lower the temperature and rough dusting after, send into fly-ash separator 4 and carry out dedusting, after flue gas is handled through pollutant purification treatment unit 5 then, send into chimney 6 and discharge.
The simple part steam that adopts waste heat boiler to produce is sent into half-dried makeup and is put mud is carried out drying and other treatment in the conventional sludge anhydration burning technology.The end slag temperature of incinerator is 700-800 ℃, discharges after the slag cooler cooling usually, and a large amount of heats in the end slag are lost like this.Entering the preceding flue-gas temperature of sack cleaner is about 150-200 ℃, and these heats are wasted.After adopting this technology, can improve the utilization rate of waste heat of system, reduce the consumption of the required steam of dewatered sludge greatly, improve the steam heating or the power generation capacity of system, strengthen the economic benefit of system.
Embodiment 1: the employing fluidized bed dryer is put in the half-dried makeup of mud
Half-driedization process is carried out in bubbling fluidized bed, and flue gas enters bed through blast cap at the bottom of bed, and mud, end slag and flying dust are sent into from different material inlets, and hot flue gas makes the mud in the lathe bed be in fluidization on the one hand, prevents the mud bonding; Also carry out abundant heat exchange with mud on the other hand, evaporation moisture wherein also helps reducing the dust content in the flue gas after moisture that is evaporated and flue gas mix, reduce for example load of sack cleaner.Adopt this system to help also to prevent that the foul smell in the drying process is excessive simultaneously, reduce and pollute, foul smell and flue gas enter the tail flue gas treatment system together, after treatment discharging.When end slag and fume afterheat were not enough to provide the needed heat of half-driedization of mud, the steam that waste heat boiler can be come carried out drying to mud after through the pipe laying that is provided with in the fluidized-bed.
Embodiment 2: the employing roller frame is put in the half-dried makeup of mud
End slag and mud are entered from the top of cylinder together, and the two slowly mixes in cylinder, carries out abundant thermal exchange, and mud is carried out half-driedization processing.Simultaneously above-mentioned flue gas is fed from cylinder bottom, flue gas adverse current and on, compile from the cylinder top exit, then enter sack cleaner, can effectively utilize waste heat like this, thereby improve the energy utilization efficiency of system greatly.Heat transfer tube is set in the cylinder, and it arranges that quantity decide according to practical situation, and when end slag and fume afterheat were not enough to provide the needed heat of half-driedization of mud, the steam that waste heat boiler can be come passed through the heat transfer tube that is provided with in the cylinder and carry out drying to mud.
It will be appreciated by those skilled in the art that the foregoing description or accompanying drawing only play the explanation the purpose of this utility model, and should not regard any restriction that it is made as.
Claims (8)
1. sludge drying and incineration system comprises:
The half-dried makeup of mud is put, and is provided with mud acceptance division and discharge portion;
Sludge incineration device is provided with half-driedization mud acceptance division, end slag discharge portion and fume emission portion; With
The fume afterheat use device is provided with flue gas acceptance division and fume emission portion,
The discharge portion that the half-dried makeup of wherein said mud is put links to each other with the half-driedization mud acceptance division of described sludge incineration device, and the fume emission portion of described sludge incineration device links to each other with the flue gas acceptance division of described fume afterheat use device,
It is characterized in that:
The half-dried makeup of described mud is put and also is provided with end slag acceptance division and flue gas acceptance division, the end slag acceptance division that the half-dried makeup of wherein said mud is put links to each other with the end slag discharge portion of described sludge incineration device, and the flue gas acceptance division that the half-dried makeup of described mud is put links to each other with the fume emission portion of described fume afterheat use device.
2. sludge drying and incineration system according to claim 1 is characterized in that:
The half-dried makeup of described mud is put and also is provided with heat transfer tube, and described fume afterheat use device is the waste heat boiler that is provided with discharge of steam portion, and the described heat transfer tube that the half-dried makeup of wherein said mud is put links to each other with the discharge of steam portion of described waste heat boiler.
3. sludge drying and incineration system according to claim 1 and 2 is characterized in that:
The half-dried makeup of described mud is put and is adopted the bubbling fluidization bed structure.
4. sludge drying and incineration system according to claim 1 and 2 is characterized in that:
The employing roller frame is put in the half-dried makeup of described mud.
5. sludge drying and incineration system according to claim 1 and 2 is characterized in that:
Described sludge incineration device adopts the circulating fluidized bed incinerator structure.
6. sludge drying and incineration system according to claim 1 is characterized in that:
Also comprise fly-ash separator, link to each other, thereby and/or put to link to each other with the half-dried makeup of described mud and can directly receive the half-dried makeup of described mud of flowing through and put the flue gas of discharge with the fume emission portion of described sludge incineration device.
7. sludge drying and incineration system according to claim 6 is characterized in that:
Also comprise the pollutant purification treatment unit, link to each other with described fly-ash separator and be positioned at described fly-ash separator downstream.
8. sludge drying and incineration system according to claim 7 is characterized in that:
Also comprise chimney, link to each other with the pollutant purification treatment unit to discharge tail gas.
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| CN2008102260309A CN101708939B (en) | 2008-11-04 | 2008-11-04 | Sludge drying incineration processing system utilizing system residual heat |
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| CN101875530A (en) * | 2010-07-08 | 2010-11-03 | 上海凡清环境工程有限公司 | Heat drying method and device of sludge |
| CN102338389A (en) * | 2011-05-23 | 2012-02-01 | 上海电力学院 | Sewage and sludge joint treatment system |
| CN103090398A (en) * | 2013-03-01 | 2013-05-08 | 福建省丰泉环保控股有限公司 | System and technology for comprehensively treating and utilizing mycelia waste produced in pharmaceutical industry in recycling mode |
| CN103134053A (en) * | 2011-11-22 | 2013-06-05 | 上海巴安水务股份有限公司 | Drying incineration treatment method for sludge containing oil |
| CN103253833A (en) * | 2013-06-03 | 2013-08-21 | 江苏金山环保工程集团有限公司 | Comprehensive treatment method for sludge or waste liquid |
| CN103420549A (en) * | 2013-07-26 | 2013-12-04 | 新汶矿业集团有限责任公司 | Harmless waste treatment method in coal chemical industry |
| CN103712216A (en) * | 2013-12-26 | 2014-04-09 | 四川四通欧美环境工程有限公司 | Sludge and waste united incineration thermoelectric processing system and method |
| CN106396336A (en) * | 2016-11-28 | 2017-02-15 | 中冶华天南京工程技术有限公司 | Thermal drying and incineration combined municipal sludge treatment system |
| CN110513704A (en) * | 2019-08-22 | 2019-11-29 | 中国城市建设研究院有限公司 | A kind of method and system of rubbish and sludge collaboration burning integrated treatment |
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| CN100557312C (en) * | 2006-12-25 | 2009-11-04 | 上海环保工程成套有限公司 | A kind of sludge desiccation burning integral treatment method and device |
| CN101274813B (en) * | 2008-05-09 | 2010-06-09 | 浙江大学 | Tail gas waste heat recovery and reutilization sludge drying system |
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| CN101875530A (en) * | 2010-07-08 | 2010-11-03 | 上海凡清环境工程有限公司 | Heat drying method and device of sludge |
| CN102338389A (en) * | 2011-05-23 | 2012-02-01 | 上海电力学院 | Sewage and sludge joint treatment system |
| CN103134053A (en) * | 2011-11-22 | 2013-06-05 | 上海巴安水务股份有限公司 | Drying incineration treatment method for sludge containing oil |
| CN103090398A (en) * | 2013-03-01 | 2013-05-08 | 福建省丰泉环保控股有限公司 | System and technology for comprehensively treating and utilizing mycelia waste produced in pharmaceutical industry in recycling mode |
| CN103253833A (en) * | 2013-06-03 | 2013-08-21 | 江苏金山环保工程集团有限公司 | Comprehensive treatment method for sludge or waste liquid |
| CN103420549A (en) * | 2013-07-26 | 2013-12-04 | 新汶矿业集团有限责任公司 | Harmless waste treatment method in coal chemical industry |
| CN103420549B (en) * | 2013-07-26 | 2014-08-06 | 新汶矿业集团有限责任公司 | Harmless waste treatment method in coal chemical industry |
| CN103712216A (en) * | 2013-12-26 | 2014-04-09 | 四川四通欧美环境工程有限公司 | Sludge and waste united incineration thermoelectric processing system and method |
| CN103712216B (en) * | 2013-12-26 | 2016-04-06 | 四川四通欧美环境工程有限公司 | Mud and rubbish combine incineration thermoelectric treatment system and processing method |
| CN106396336A (en) * | 2016-11-28 | 2017-02-15 | 中冶华天南京工程技术有限公司 | Thermal drying and incineration combined municipal sludge treatment system |
| CN110513704A (en) * | 2019-08-22 | 2019-11-29 | 中国城市建设研究院有限公司 | A kind of method and system of rubbish and sludge collaboration burning integrated treatment |
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